ED43B025 - 25Amp Circuit Breaker

ED43B025 - 25Amp Circuit Breaker

If you need a circuit breaker that fits your existing setup without hassle, the Siemens ED43B025 is a solid option. This 25 Amp, 3-pole molded case circuit breaker is built for dependable overcurrent protection in commercial and industrial systems. It’s designed as a form, fit, and functional replacement for compatible Siemens ED-frame breakers, so you can swap it in without major changes to your equipment.

Part of the Siemens Sentron ED frame line, the ED43B025 uses a thermal magnetic trip unit to handle both overloads and short circuits. The thermal side responds to sustained overcurrent, while the magnetic trip reacts quickly to higher fault levels. With a 480V AC rating and an 18kA interrupting capacity (18kAIC), it’s suited for a range of demanding applications. It also comes with load-side lugs (SA1E025) and supports 14–10 AWG copper or 12–10 AWG aluminum conductors, helping keep installation straightforward.

Key Features and Benefits

• Part of the Siemens Sentron ED frame circuit breaker family
• 25 Amp continuous current rating
• 3-pole design for three-phase systems
• Thermal magnetic trip unit for overload and short-circuit protection
• Rated for 480V AC applications
• 18kA interrupting capacity (18kAIC)
• Includes load-side lugs (SA1E025)
• Accepts 14–10 AWG copper and 12–10 AWG aluminum conductors
• Designed for standard 40°C operating conditions
• Direct replacement for compatible Siemens ED-frame breakers
• Suitable for commercial and industrial use
  

Technical Specifications

• Catalog Number: ED43B025
  
• Manufacturer: Siemens
  
• Product Type: Molded Case Circuit Breaker
  
• Series / Frame: Sentron ED Frame
  
• Trip Unit: Thermal Magnetic
  
• Amperage Rating: 25 Amps
  
• Voltage Rating: 480V AC
  
• Number of Poles: 3
  
• Interrupting Rating: 18kAIC at 480V AC
  
• Terminal Type: Load Lugs (SA1E025)
  
• Wire Range: 14–10 AWG Copper / 12–10 AWG Aluminum
  
• Reference Operating Temperature: 40°C
  
• Dimensions:
  • Width: 3.00 in.
  • Height: 6.35 in.
  • Depth: 3.92 in.
• Weight: 3.688 lb.
  
• Product Family: ED4 18kAIC, 480VAC
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

The Siemens ED43B025 meets UL 489 and IEC 60947-2 standards for molded case circuit breakers. It is RoHS compliant (since July 1, 2006) and aligns with WEEE (2012/19/EU) requirements where applicable. Material information is available under REACH Article 33. Installation should be completed by qualified personnel in accordance with NEC and local electrical codes.

Where It Works Best

• Siemens ED-frame panelboards and switchboards
• Commercial and industrial electrical distribution systems
• 480V AC branch circuit protection
• Manufacturing facilities, warehouses, and commercial buildings
• Replacement of existing Siemens ED-frame breakers
• Applications needing a 25 Amp, 3-pole breaker with 18kA interrupting capacity
• Systems using load-side lug connections
• Projects where maintaining compatibility with existing equipment is important